This Philips HeartStart AED Battery keeps your FRx, OnSite, or HS1 AED powered and ready to go. With a four-year lifespan in standby mode, you won't be replacing batteries constantly, and the click-and-replace design makes swapping them out quick and simple when the time comes. Over its lifetime, this high-capacity battery can deliver up to 200 shocks or provide four hours of continuous monitoring during an emergency. That's serious staying power when it matters most. Whether your AED is your rescue buddy in your workshop or at the kids’ hockey practice, this battery helps keep your device rescue-ready without adding stress to your maintenance routine. Why You’ll Love It: Works with multiple models: Fits Philips FRx, OnSite, and HS1 defibrillators Four years between changes: Long lifespan means fewer replacements to think about High-capacity power: Delivers up to 200 shocks or four hours of monitoring Easy to swap: Click-and-replace design keeps battery changes simple and quick